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offsetof

Section: Standard C Library Functions (3C)
Updated: 29 Dec 1996
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NAME

offsetof - offset of structure member

SYNOPSIS

#include <stddef.h>

size_t offsetof(type, member-designator);

DESCRIPTION

The offsetof() macro defined in <stddef.h> expands to an integral constant expression that has type size_t. The value of this expression is the offset in bytes to the structure member (designated by member-designator) from the beginning of its structure (designated by type).

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

MT-Level MT-Safe